我尝试在GWT中使用bean验证。我按照本指南操作: https://developers.google.com/web-toolkit/doc/latest/DevGuideValidation
在编译时,我有以下错误:
ERROR: Could not load deferred binding result type 'com.google.gwt.sample.validation.client.SampleValidatorFactory'
如果我包含这种依赖,我可以使它工作:
<dependency>
<groupId>com.googlecode.gwt-validation</groupId>
<artifactId>gwt-validation</artifactId>
<version>2.1</version>
</dependency>
但我发现它很奇怪,因为指南中没有提到这种依赖性。
问题:由于GWT 2.5应该支持bean验证,为什么我需要这个额外的库?我做错了什么?
我正在使用GWT 2.5.0
我的pom.xml包含以下依赖项:
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.3.1.Final</version>
<type>jar</type>
<classifier>sources</classifier>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.3.1.Final</version>
<type>jar</type>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.0.0.GA</version>
<type>jar</type>
<classifier>sources</classifier>
</dependency>
<dependency>
<groupId>javax.validation</groupId>
<artifactId>validation-api</artifactId>
<version>1.0.0.GA</version>
<type>jar</type>
</dependency>
和我的gwt.xml包含以下几行:
<inherits name="org.hibernate.validator.HibernateValidator" />
<replace-with
class="com.google.gwt.sample.validation.client.SampleValidatorFactory">
<when-type-is class="javax.validation.ValidatorFactory" />
</replace-with>
在代码中,我以这种方式获得Validator:
import javax.validation.Validator;
...
private static final Validator VALIDATOR= Validation.buildDefaultValidatorFactory().getValidator();
答案 0 :(得分:2)
您正在将第三方库gwt-validation与Native GWT验证混合使用。 gwt-validation不是来自官方gwt团队或google。如果您打算坚持使用本机gwt验证支持,则不应在pom中使用以下内容。
<dependency>
<groupId>com.googlecode.gwt-validation</groupId>
<artifactId>gwt-validation</artifactId>
<version>2.1</version>
</dependency>
另请注意,您只有本机gwt hibernate验证器支持高达4.1.0。 GWT Sample用法。 GWT本机休眠验证器source code。
您可以将其包含在
中<!-- Hibernate bean validation binary for the server -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.1.0.Final</version>
<exclusions>
<exclusion>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
</exclusion>
<exclusion>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- Hibernate bean validation source for the GWT client -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>4.1.0.Final</version>
<classifier>sources</classifier>
<exclusions>
<exclusion>
<groupId>javax.xml.bind</groupId>
<artifactId>jaxb-api</artifactId>
</exclusion>
<exclusion>
<groupId>com.sun.xml.bind</groupId>
<artifactId>jaxb-impl</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- Required by Hibernate validator because slf4j-log4j is
optional in the hibernate-validator POM
-->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.6.1</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.6.1</version>
</dependency>